Effectiveness of actions to give up smoking after 6 and 12 months.
| Advice n = 86 | Motivational Interviewing n = 114 | P | OR | 95% CI | NNT | |
|---|---|---|---|---|---|---|
| Abstinence after 6 months (%)a | 3 (3.5) | 21(18.4) | 0.00 | 6.25 | 1.8–21.71 | 7 |
| Abstinence after 12 months (%)a | 3 (3.5) | 21(18.4) | 0.001 | 6.25 | 1.8–21.71 | 7 |
↵a The fact that identical abstinence figures were obtained at 6 and 12 months in both groups was purely coincidental.
NNT = number needed to treat.
OR = odds ratio.